21283856

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:180

約数の個数: 80

約数和(自身を含む): 47996928

約数和(自身を除く): 26713072

約数列:

[1, 2, 4, 8, 11, 16, 22, 31, 44, 47, 62, 83, 88, 94, 124, 166, 176, 188, 248, 332, 341, 376, 496, 517, 664, 682, 752, 913, 1034, 1328, 1364, 1457, 1826, 2068, 2573, 2728, 2914, 3652, 3901, 4136, 5146, 5456, 5828, 7304, 7802, 8272, 10292, 11656, 14608, 15604, 16027, 20584, 23312, 28303, 31208, 32054, 41168, 42911, 56606, 62416, 64108, 85822, 113212, 120931, 128216, 171644, 226424, 241862, 256432, 343288, 452848, 483724, 686576, 967448, 1330241, 1934896, 2660482, 5320964, 10641928, 21283856]

約数ペア:

[(1, 21283856), (2, 10641928), (4, 5320964), (8, 2660482), (11, 1934896), (16, 1330241), (22, 967448), (31, 686576), (44, 483724), (47, 452848), (62, 343288), (83, 256432), (88, 241862), (94, 226424), (124, 171644), (166, 128216), (176, 120931), (188, 113212), (248, 85822), (332, 64108), (341, 62416), (376, 56606), (496, 42911), (517, 41168), (664, 32054), (682, 31208), (752, 28303), (913, 23312), (1034, 20584), (1328, 16027), (1364, 15604), (1457, 14608), (1826, 11656), (2068, 10292), (2573, 8272), (2728, 7802), (2914, 7304), (3652, 5828), (3901, 5456), (4136, 5146)]